Need the perfect middle name for Arabella (nickname "Bella") that will be used a lot.

My older daughter is named KatelynRose and we always call her "KatieRose". For this baby (due in October) we have settled on the name Arabella, but will most likely be calling her Bella and I want to find a middle name that sounds great saying it together with Bella but I am stumped! I have friends with two daughters named AlexisKatherine (nickname is AliKat) and the other daughter is SamanthaJosephine (nickname SammieJo) I absolutley LOVE the idea of longer first and middle names with matching nicknames like that. So I am looking for either a short middle name that goes well with Bella or a longer middle name that can be shortened into a nickname that goes well with Bella. It will be something we use often and call her everyday. Hopefully that makes sense! Thank you SO much for any suggestions! :)